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Alloy Constructional Steel

Alloy Constructional Steel

Crank shafts, automobile axle beams, connecting rods, lightly Stressed gears. Generaly used for moderately streesed parts of Motor Vehicles and general engineering works.

Typical Analysis In %

C Si Mn Cr W V Co Mo Ni
0.35-0.45 0.10-0.35 0.60-0.90 - S&P (Max) each 0.06 - -


Heat Treatment & Processing

Forging Temp. °C Annealing Temp. °C Hardening Temp. °C Quenching Medium Tempering Temp. °C Hardness Rockwell °C
1050-1100 800-900 1000 O Rapid Cooling 700-750 BHN 159-229 BHN 135-185


Equivalent Grades

BS 970 (REVISED) 1970-1972 BS 970-1955 En No. AISI/SAE DIN Japan U.S.S.R. IS
080M40 8 1040 - - 40
Grade Specification
- -